# MarketFactory.sol

Singleton factory that creates and manages prediction markets.

## `createMarket(priceId, duration, batchInterval, minLots)`

* Registers a new market in OrderBook via `registerMarket()`
* Requires MARKET\_CREATOR\_ROLE
* Stores MarketMeta with lifecycle tracking
* Emits `MarketCreated` event

### Parameters

| Param           | Description                                   | Default  |
| --------------- | --------------------------------------------- | -------- |
| `priceId`       | Pyth price feed ID (bytes32)                  | required |
| `duration`      | Market duration in seconds                    | required |
| `batchInterval` | Batch clearing interval (0 = use default 60s) | 60s      |
| `minLots`       | Minimum order size (0 = use default 1)        | 1        |

## State Machine

```
Open → Closed → Resolving → Resolved
                               ↓
Open → Closed ─────────────→ Cancelled
```

### Transitions

| From        | To        | Trigger          | Condition                       |
| ----------- | --------- | ---------------- | ------------------------------- |
| Open        | Closed    | `closeMarket()`  | `block.timestamp >= expiryTime` |
| Closed      | Resolving | `setResolving()` | ADMIN\_ROLE (PythResolver)      |
| Resolving   | Resolved  | `setResolved()`  | ADMIN\_ROLE (PythResolver)      |
| Open/Closed | Cancelled | `cancelMarket()` | 24h after expiry, no resolution |

## Market Registry

* `getActiveMarketCount()` — number of markets in Open state
* `getClosedMarketCount()` — number of closed markets
* `getResolvedMarketCount()` — number of resolved markets

## Admin Functions

| Function             | Access      | Description                              |
| -------------------- | ----------- | ---------------------------------------- |
| `pauseFactory()`     | ADMIN\_ROLE | Emergency pause on market creation       |
| `setDefaultParams()` | ADMIN\_ROLE | Update default batch interval + min lots |
| `setCreationBond()`  | ADMIN\_ROLE | Update required creation bond            |
| `setFeeCollector()`  | ADMIN\_ROLE | Update protocol fee collector address    |

## Access Control

* **ADMIN\_ROLE:** PythResolver (for `setResolving`, `setResolved`, `payResolverBounty`)
* **DEFAULT\_ADMIN\_ROLE:** protocol admin (pause, parameter updates)
* `closeMarket()` and `cancelMarket()` are permissionless
* Market creation requires MARKET\_CREATOR\_ROLE

## Events

```solidity
event MarketCreated(uint256 indexed factoryMarketId, uint256 indexed orderBookMarketId, bytes32 priceId, int64 strikePrice, uint256 expiryTime, address indexed creator);
event MarketClosed(uint256 indexed factoryMarketId);
event MarketStateChanged(uint256 indexed factoryMarketId, MarketState newState);
event FactoryPaused(bool paused);
event DefaultParamsUpdated(uint256 batchInterval, uint128 minLots);
event CreationBondUpdated(uint256 newBond);
event FeeCollectorUpdated(address indexed collector);
event ResolverBountyPaid(uint256 indexed factoryMarketId, address indexed resolver, uint256 amount);
```


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